js-mgf
v1.1.0
Published
A general purpose module for parsing mgf files
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js-mgf
This module provides simple mgf file parsing
Installation
npm install js-mgf --save
Usage
Quickstart example:
var fs = require('fs');
var mgf = require('js-mgf');
var filename = 'test.mgf';
fs.readFile(filename, 'utf8', function(err, data){
if (err) throw err;
spectra = mgf.parse(data);
console.log(spectra);
});
Output:
[ { title: 'First spectrum',
rt: 500,
pepmass: 432,
pepintensity: 12000,
charge: 2,
mz: [ 123, 549, 567, 657 ],
intensity: [ 54, 12, 100, 34 ] },
{ title: 'Second spectrum = something cool',
rt: 510,
pepmass: 679.32,
charge: -3,
mz: [ 123.4, 549.6, 567.8, 657.1 ],
intensity: [ 54.12, 12.89, 100.67, 34.45 ] } ]
Contents of test.mgf
BEGIN IONS
TITLE=First spectrum
RTINSECONDS=500
PEPMASS=432 12000
CHARGE=2+
123 54
549 12
567 100
657 34
END IONS
BEGIN IONS
TITLE=Second spectrum = something cool
RTINSECONDS=510
PEPMASS=679.32
CHARGE=3-
123.4 54.12
549.6 12.89
567.8 100.67
657.1 34.45
END IONS
This module only has the one parse
method and takes as input the text content of an mgf file. This module will read the following information:
- TITLE as
title
- RTINSECONDS as
rt
- PEPMASS as
pepmass
andpepintensity
if the second intensity value is present - CHARGE as
charge
- All the mz and intensity values into the
mz
andintensity
arrays.
No other fields will be read from the mgf file.
Tests
You can run npm test
to run the tests after installing the development dependencies.
Future functionality
No future functionality is planned.
License
This software is released under the MIT license.